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Flagstang, there is another copy of the original imageres.dll file. It's located in the Winsxs sub folders. The folder with "amd64" prefix is the one you want for a 64 bit installation, and "x86" prefix for a 32 bit installation. This is of course assuming you didn't replace those.

All that BS to just change my startup sound, when it just took click-click in XP?!
Gee, I never had any malware problem with that OS!
Every day is something new to hate about 7 taking control out of the hands of users. Jeez Louise.

How often does the average user (non-power user/technician) use the SFC Scan?

Probably like never... but aside from SFC scan, there could be other Windows updates that might detect the imageres.dll out of sync and replace it. It's just good to be aware of this. In any case, like you said it's very easy to apply the change again.

Yeah, you're right OM... it's a pain that Microsoft singled out the start-up sound from being accessible in the sound control panel. They should have provided an alternate means of changing it, if they wanted the average person to leave it alone. I'm curious what the deal is with Windows 8...

Im having some super problems with this. Im using Windows 7 Ultimate x64. So when i move the imageres to my desktop and change the sound, it works! it plays my sound. But when i move it back into system32, and i open it with res hack, its the default sound. Why is it doing this?

Startup Sound - Change in Windows 7

How to change Windows 7 startup soundHOW TO CHANGE WINDOWS 7 STARTUP SOUND
https://www.sevenforums.com/tutorials/63398-startup-sound-change-windows-7-a.html
1.select an audio file of your choice and make sure you convert it to a wave file not just wav
2.rename it 5080 if you are uesing english version of windows 7 united...

Windows 7 Startup change?Hello,
This is a pretty new laptop. Three weeks old to be exact. Anywho. You guys know how on Windows 7 when you start up the laptop/desktop/all-in-one those cool red, blue, green, and yellow are supposed to come and make the windows Icon? Well, I'm not exactly sure when this changed, but not...

Change startup sound without a dll hack!Hi,
If you prefer the normal way to change the .dll, then this will show you how to: https://www.sevenforums.com/tutorials/63398-startup-sound-change-windows-7-a.html
Below is a and simple trick to change the startup sound for Win7 that does not involve changing a dll. So, for anyone who...

Customization

Can you change the startup sound?With every other version of Windows I have been able to use my own startup sounds.
Just a little something to put a smile on my face when I start my computer up each day.
Is Win 7 ever going to let us do this???
How about it guys?????? Can you make this little change please????:D